FR2193978A1 - - Google Patents
Info
- Publication number
- FR2193978A1 FR2193978A1 FR7314088A FR7314088A FR2193978A1 FR 2193978 A1 FR2193978 A1 FR 2193978A1 FR 7314088 A FR7314088 A FR 7314088A FR 7314088 A FR7314088 A FR 7314088A FR 2193978 A1 FR2193978 A1 FR 2193978A1
- Authority
- FR
- France
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R23/00—Arrangements for measuring frequencies; Arrangements for analysing frequency spectra
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Frequencies, Analyzing Spectra (AREA)
- Amplifiers (AREA)
- Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
- Networks Using Active Elements (AREA)
- Measurement Of Current Or Voltage (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US27420372A | 1972-07-24 | 1972-07-24 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| FR2193978A1 true FR2193978A1 (enrdf_load_stackoverflow) | 1974-02-22 |
| FR2193978B1 FR2193978B1 (enrdf_load_stackoverflow) | 1977-07-29 |
Family
ID=23047222
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR7314088A Expired FR2193978B1 (enrdf_load_stackoverflow) | 1972-07-24 | 1973-04-18 |
Country Status (10)
| Country | Link |
|---|---|
| US (1) | US3755734A (enrdf_load_stackoverflow) |
| JP (2) | JPS4946776A (enrdf_load_stackoverflow) |
| CA (1) | CA972036A (enrdf_load_stackoverflow) |
| CH (1) | CH552219A (enrdf_load_stackoverflow) |
| DE (1) | DE2325641A1 (enrdf_load_stackoverflow) |
| FR (1) | FR2193978B1 (enrdf_load_stackoverflow) |
| GB (1) | GB1418773A (enrdf_load_stackoverflow) |
| IT (1) | IT980189B (enrdf_load_stackoverflow) |
| NL (1) | NL156511B (enrdf_load_stackoverflow) |
| SE (1) | SE394033B (enrdf_load_stackoverflow) |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4319329A (en) * | 1980-02-21 | 1982-03-09 | Iowa State University Research Foundation, Inc. | Frequency measuring and monitoring apparatus, methods and systems |
| JPS57112997U (enrdf_load_stackoverflow) * | 1981-01-05 | 1982-07-13 | ||
| US4547726A (en) * | 1983-08-01 | 1985-10-15 | General Electric Company | Means and method for measuring power system frequency |
| US5721689A (en) * | 1995-12-18 | 1998-02-24 | Abb Power T&D Company Inc. | System and method for phasor estimation and frequency tracking in digital protection systems |
| US6185482B1 (en) | 1998-03-10 | 2001-02-06 | Abb Power T&D Company Inc. | System and method for rms overcurrent backup function |
| JP2010271091A (ja) | 2009-05-20 | 2010-12-02 | Seiko Epson Corp | 周波数測定装置 |
| JP5517033B2 (ja) | 2009-05-22 | 2014-06-11 | セイコーエプソン株式会社 | 周波数測定装置 |
| JP5440999B2 (ja) * | 2009-05-22 | 2014-03-12 | セイコーエプソン株式会社 | 周波数測定装置 |
| JP5582447B2 (ja) | 2009-08-27 | 2014-09-03 | セイコーエプソン株式会社 | 電気回路、同電気回路を備えたセンサーシステム、及び同電気回路を備えたセンサーデバイス |
| JP5815918B2 (ja) | 2009-10-06 | 2015-11-17 | セイコーエプソン株式会社 | 周波数測定方法、周波数測定装置及び周波数測定装置を備えた装置 |
| JP5876975B2 (ja) | 2009-10-08 | 2016-03-02 | セイコーエプソン株式会社 | 周波数測定装置及び周波数測定装置における変速分周信号の生成方法 |
| JP5883558B2 (ja) | 2010-08-31 | 2016-03-15 | セイコーエプソン株式会社 | 周波数測定装置及び電子機器 |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2480128A (en) * | 1945-10-03 | 1949-08-30 | Standard Telephones Cables Ltd | Frequency measuring system |
| US3119064A (en) * | 1961-12-01 | 1964-01-21 | Hughes Aircraft Co | Quadrature phase detector employing transistor switching means |
-
1972
- 1972-07-24 US US00274203A patent/US3755734A/en not_active Expired - Lifetime
-
1973
- 1973-03-20 GB GB1345173A patent/GB1418773A/en not_active Expired
- 1973-04-02 CA CA167,657A patent/CA972036A/en not_active Expired
- 1973-04-03 JP JP48038202A patent/JPS4946776A/ja active Pending
- 1973-04-12 IT IT49412/73A patent/IT980189B/it active
- 1973-04-18 FR FR7314088A patent/FR2193978B1/fr not_active Expired
- 1973-05-15 NL NL7306726.A patent/NL156511B/xx unknown
- 1973-05-21 DE DE2325641A patent/DE2325641A1/de not_active Withdrawn
- 1973-05-24 CH CH741573A patent/CH552219A/xx not_active IP Right Cessation
- 1973-07-20 SE SE7310189A patent/SE394033B/xx unknown
-
1978
- 1978-05-02 JP JP1978060229U patent/JPS542475U/ja active Pending
Non-Patent Citations (1)
| Title |
|---|
| NEANT * |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS542475U (enrdf_load_stackoverflow) | 1979-01-09 |
| SE394033B (sv) | 1977-05-31 |
| US3755734A (en) | 1973-08-28 |
| NL7306726A (enrdf_load_stackoverflow) | 1974-01-28 |
| GB1418773A (en) | 1975-12-24 |
| IT980189B (it) | 1974-09-30 |
| DE2325641A1 (de) | 1974-02-14 |
| CA972036A (en) | 1975-07-29 |
| CH552219A (de) | 1974-07-31 |
| JPS4946776A (enrdf_load_stackoverflow) | 1974-05-04 |
| NL156511B (nl) | 1978-04-17 |
| FR2193978B1 (enrdf_load_stackoverflow) | 1977-07-29 |
Similar Documents
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| ST | Notification of lapse |